Box extrusion



FIG. 1 is a perspective view of a box extrusion showing my new design;

FIG. 2 is a right end elevational view thereof, the left end elevational view being a mirror image thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a rear elevational view thereof; and,

FIG. 6 is a bottom plan view thereof.

A characteristic feature of the design of the box extrusion is the extremely large height dimension in relation to the width of the device, with a large closed box-like member being the largest single segment, in terms of area, of the device, the dimensions resulting in a vaulted arch-like appearance. 

The ornamental design for a box extrusion, as shown and described. 